JP Morgan Chase Angular Interview Questions for 5+ years

Shared question set for 5+ years of experience. Topics and wording follow the supplied notes; these are questions, not official company guidance.

1. What are Core and Shared modules? Explain the difference with a practical example.
2. Give a practical example of the fromEvent operator.
3. What are practical use cases of pure and impure pipes in industry?
4. What are an access token and a refresh token?
5. How can you improve Angular application performance?
6. What is Angular Universal and why is it used?
7. How can you dynamically load a component in Angular?
8. How do you create a custom pipe in Angular? Write code.
9. What is the role of the Injector in Angular?
10. What are Angular guards and their different types?
11. What is trackBy in ngFor and why is it important?
12. What is ngZone in Angular?
13. Explain Angular lifecycle hooks and their real usage.
14. What is the difference between template-driven and reactive forms?
15. Explain the Angular change detection mechanism.
16. What is the purpose of the @Input and @Output decorators?
17. What is the difference between hot and cold observables?
18. Create a service in Angular and perform CRUD operations. Write generic reactive form code with validations.
19. Can we write [ngIf]? If yes, how? If no, explain.
20. What is the difference between constructor and ngOnInit?
21. How do you secure Angular applications from XSS attacks?
22. Explain RxJS operators.
23. What is the difference between ViewChild and ContentChild?
24. How would you debug an Angular application?
25. Write code using switchMap, concatMap, mergeMap and forkJoin in scenario-based examples.
26. Write code where an API fails the first time and succeeds the second time.

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